#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#define SOCKET_PATH "./socket.domain"
#define MSG_STR "Hello, Unix Domain Socket Server!"
int main(int argc, char **argv)
{
 int conn_fd = -1;
 int rv = -1; 
 char buf[1024];
 struct sockaddr_un serv_addr;
 conn_fd = socket(AF_UNIX, SOCK_STREAM, 0);
 if(conn_fd < 0)
 {
 printf("create socket failure: %s\n", strerror(errno));
 return -1;
 }
 memset(&serv_addr, 0, sizeof(serv_addr));
 serv_addr.sun_family=AF_UNIX;
 strncpy(serv_addr.sun_path, SOCKET_PATH, sizeof(serv_addr.sun_path)-1);
 if( connect(conn_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
 {
 printf("connect to unix domain socket server on \"%s\" failure: %s\n", SOCKET_PATH,
strerror(errno));
 return 0;
 }
 printf("connect to unix domain socket server on \"%s\" ok\n", SOCKET_PATH);
 
 if( write(conn_fd, MSG_STR, strlen(MSG_STR)) < 0 )
 {
 printf("write data to unix domain socket server on \"%s\" failure: %s\n", SOCKET_PATH,
strerror(errno));
 goto cleanup;
 }
 
 memset(buf, 0, sizeof(buf));
 rv = read(conn_fd, buf, sizeof(buf)); 
 if(rv < 0)
 {
 printf("Read data from server failure: %s\n", strerror(errno));
 goto cleanup;
 }
 else if( 0 == rv )
 {
 printf("Client connect to server get disconnected\n");
 goto cleanup;
 }
 printf("Read %d bytes data from server: '%s'\n", rv, buf);
cleanup:
 close(conn_fd);
}

